Welding-strip.



UNITED STATES PATENT OFFICE.

SAMUEL VANSTONE, OF PROVIDENCE, RHODEISLAND.

WELDING-STRIP.

.LIPECIFICATION formingpart of Letters Patent No. 667,045, dated January29, 1901.

Application filed April 17, 1899. Serial No. 713,277. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL VANsTONE, a citizen of the United States,residing atProvideuce, in the State of Rhode Island, have invented a newand useful Improvement in Welding-Strips for the Seams of Tubes orHollow Shafts, of which the following is a specification.

My invention relates to the improved construction of the welding-stripemployed for welding the seams of tubes or hollow shafts.

In the accompanying drawings, Figure 1 represents the side view of atube haviugits longitudinal seam prepared for welding in accordance withmy improvement. Fig. 2 represents a transverse section of the same. Fig.3 represents a transverse section of the strip employed to form thewelded seam. Fig. 4 represents a face view of the same. Fig. 5represents the longitudinal section of a tube and an axial section of ahead to be welded thereto by means of a welding-ring embodying myimprovement.

In the drawings, Fig. 2, A represents a plate of metal bentincylindrical form,with an open longitudinal seam b, in which is placedthe rib c of the welding-strip D,the said welding-strip being made ofany desired length and provided at its inner side with the slight knobsor proj ections a a, formed integrally with the strip, whereby thewelding-surfaces f f will notcome in contact with the adjacent surfacesof the bent plate A, but will allow the flame of the furnace to enterthe space between these surfaces, and thus properly heat the same forwelding. When the welding-strip D is arranged, as shown in Fig. 2, witha suitable flux and properly heated, then by passing the prepared seamunder a suitable pressure-roll a strong weld will be eifected by theaction of the roll, the-adjacent parts of the bent plate A being lappedupon the welding-surfaces f f, with the edges 01 d abutting the sides ofthe rib c.

When it is desired to weld a flanged head G upon the end of the tube,the welding-strip D is bent to form a welding-ring D, as shown in theedge View, Fig. 6, the said'iing serving to form the welded joint whensubjected to the proper degree of heat and the required action of apressure-roll or hammering.

I make no broad claim to a welding-strip provided with a central ribagainst which the edges of the seam are abutted and welding-surfaces atoppositesides qf the rib, as such a welding-stripqhas been shown inLetters Patent of the United States No. 509,526.

I claim as my invention The welding-strip, provided with the projectingrib, and the welding-surfaces at opposite sides of the rib, the saidsurfaces being provided with integral raised points or knobs to preventcontact of the surfaces while in the furnace, substantially asdescribed.

' SAMUEL VANSTONE.

Witnesses:

SOORATES SOHOLFIELD, WALTER E. BURTON.

